Most insomnia is not an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications, anxiety about travel, or stress before a job interview.
- an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications
- an illness or a physical condition so much as symptomatic of another problem that may be a simple one, like a reaction caused by certain medications
- so much an illness or a physical condition but a symptom of another problem that may be as simple as when certain medications cause a reaction
- so much an illness or a physical condition, but it is a symptom of another problem, maybe a simple one like certain medications causing a reaction
- so much an illness or a physical condition but symptomatic of another problem, maybe simply a reaction to certain medications
答案是Ｅ， 我选Ｃ虽然觉得as when 也不对，但是觉得Ｅ中symptomatic 与an illness 不平行 | 
